JVC AV-32WIDE

Currently, it's in 4:3 mode, and I've tried almost all the combinations of the keys to make it back to 16:9, but all failed. When I press "DISPLAY" for a first time, it shows the channel No. on the right top of the screen, and it shows "CLOCK STOPPED" when I press a second time. Can you help me to judge the problem? PS: the remote controller's type is RM-C462 Thanks

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